               "Test Mechanisms effective at identifying the cyber Observables specified in this cyber threat Indicator")
 
     ;; Extension fields:
-    :producer s/Str
+    :producer s/Str ;; TODO - Document what is supposed to be in this field!
     (s/optional-key :specifications) [(s/conditional
                                        #(= "Judgement" (:type %)) JudgementSpecification
                                        #(= "ThreatBrain" (:type %)) ThreatBrainSpecification

(s/defschema ThreatBrainSpecification
  "An indicator which runs in threatbrain..."
  {:type (s/eq "ThreatBrain")
   :query s/Str
   :variables [s/Str] })

(s/defschema SnortSpecification

    (s/optional-key :type)
    (describe [v/IndicatorType]
              "Specifies the type or types for this Indicator")

    (s/optional-key :tags)
    (describe [s/Str]
              "Descriptors for this indicator")

    (s/optional-key :observable)
    (describe c/Observable
